<template>
  <div class="login_container">
    <!-- 外框 -->
    <div class="login_box">
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="" />
      </div>
      <!-- 登录表单 -->
      <el-form ref="loginFormRef" :model="loginForm" :rules="logFormRules" label-width="0" class="login_form">
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="el-icon-user-solid"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input v-model="loginForm.password" prefix-icon="el-icon-key" type="password"></el-input>
        </el-form-item>
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="primary" @click="resetloginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 登录表单的数据绑定对象 prop="username"指定验证
      loginForm: {
        username: 'admin',
        password: '123456',
      },
      // 表单验证规则对象
      logFormRules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' },
        ],
        // 验证密码
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 10, message: '长度在 6 到 10 个字符', trigger: 'blur' },
        ],
      },
    }
  },
  methods: {
    resetloginForm() {
      // console.log(this)
      this.$refs.loginFormRef.resetFields()
    },
    login() {
      this.$refs.loginFormRef.validate(async (valid) => {
        if (!valid) return
        //请求promis 通过async await修饰符获取data对象
        const {data:res} = await this.$http.post('login', this.loginForm);
        // 判断登录
        if(res.meta.status !== 200)return this.$message.error('登录失败')//导入message UI弹框提示信息
        this.$message.success("登录成功")//导入message UI弹框提示信息
        // 将登录成功后的token保存到客户端的sessionStorage
        // 项目中出了登录之外的其他API接口必须再登录之后才能访问
        // token只应再网站打开期间生效 所以将token保存再sessionStorage中
        // 通过编程式导航跳转到后台主页 路由地址是 /home
        console.log(res);
        window.sessionStorage.setItem('token',res.data.token)
        // 把token保存在页面里
        this.$router.push('/home')
      })
    },
  },
}
</script>

<style lang="less" scoped>
.login_container {
  background-color: red;
  height: 100%;
}
.login_box {
  width: 500px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  .avatar_box {
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    height: 150px;
    width: 150px;
    border-radius: 50%;
    padding: 10px;
    img {
      height: 100%;
      width: 100%;
      border-radius: 50%;
      background-color: blanchedalmond;
    }
  }
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
.btns {
  display: flex;
  justify-content: flex-end;
}
</style>